Effect of surfactant addition on removal of microbubbles using ultrasound

Daisuke Kobayashi, Yoshiyuki Hayashida, Kazuki Sano, Koichi Terasaka

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

It is difficult to control the bubble in a liquid by the external operation, because the behavior of the bubble is controlled in buoyancy and flow of liquid. On the other hand, microbubbles, whose diameter is several decades μm, stably disperse in static liquid because of their small buoyancy and electrical repulsion. When an ultrasound, whose frequency was 2.4 MHz, was irradiated, the milky white microbubbles suspended solution became rapidly clear. In this study, the effects of surfactant addition on the removal of microbubbles from a liquid in an ultrasonic field were investigated. The efficiency of removal of microbubbles decreased with surfactant addition. Surfactant type influenced the size of agglomerated microbubbles, and the efficiency of removal of microbubbles changed. The surface of microbubble was modified by surfactant adsorption, and the steric inhibition influenced the removal of microbubbles.

Original languageEnglish
Pages (from-to)1425-1429
Number of pages5
JournalUltrasonics
Volume54
Issue number6
DOIs
Publication statusPublished - 2014 Aug

Keywords

  • Agglomeration
  • Bjerknes force
  • Microbubble
  • Surfactant
  • Ultrasound

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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